Police responded to a home in the 2000 block of Hermosa Drive in north Boulder around 10 a.m. Wednesday. Forty-five minutes later, a man with what appeared to be heavily bandaged hands was escorted out, and taken away in an ambulance.

Cordingly said once Tarr is cleared, he will be arrested on suspicion of first- and fourth-degree arson, extraction of marijuana concentrate, criminal mischief and reckless endangerment.

He also is facing a charge of possession of a controlled substance after police said he was found with 24.5 grams of methamphetamine.

Tarr has a previous arrest in Boulder County in 2015 on drug possession, according to court records.

Police previously had announced they were looking for two suspects, a man and a woman, but Cordingly said that investigators talked to the woman and determined she was not involved.

The blast at the former Broker Inn, 555 30th St., occurred at 4:26 a.m. April 13, and police confirmed the explosion was a result of the highly volatile practice of butane hash oil extraction.

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Police said it appeared the people in the room had been extracting the oil in the bathroom. Police at the time said they believed the suspects were not in the room at the time of the explosion, which took down the wall between the bathroom and the rest of the room before blowing out the window and the door.

The cost of the damage was estimated to be $10,000, Cordingly said.

Hash oil is made by running butane or another solvent through a tube filled with dried marijuana clippings, leaving behind an oily liquid that can be solidified by heating the mixture to evaporate the butane.

But the process is volatile and can result in explosions if the room being used is not properly ventilated.

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